メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.1937500 32.8000000, 130.2000000 32.8000000, 130.2000000 32.8041667, 130.1937500 32.8041667, 130.1937500 32.8000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral